JPH05212062A - Production of porcelain tooth and its apparatus - Google Patents
Production of porcelain tooth and its apparatusInfo
- Publication number
- JPH05212062A JPH05212062A JP5682192A JP5682192A JPH05212062A JP H05212062 A JPH05212062 A JP H05212062A JP 5682192 A JP5682192 A JP 5682192A JP 5682192 A JP5682192 A JP 5682192A JP H05212062 A JPH05212062 A JP H05212062A
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- JP
- Japan
- Prior art keywords
- porcelain
- furnace
- tooth
- firing
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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- Dental Prosthetics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属製義歯体など歯冠
に陶材を焼き付けて補綴用陶歯を製造する方法及びその
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing porcelain teeth for prosthesis by baking porcelain on a crown such as a metal denture.
【０００２】[0002]
【従来の技術】歯科の治療分野では、う触等により欠損
した歯牙の一部を補綴するのに、従来は、残存する生活
歯牙根幹に金合金の歯冠を被帽固着して、歯牙に形整す
ることがなされているが、近年は、金合金が高価である
ため、Ｃｏ−Ｃｒ合金又はＮｉ−Ｃｒ合金を利用し、そ
の表面色調を天然歯牙の外観に近似させて審美性を付与
するために、酸化物系の陶材を焼き付けて、表面を陶器
質とする方法が広く実用化されている。また、最近は、
これらの合金よりも人体に対する為害性が少ない金属チ
タン又はチタン合金が、耐食性と共に強度、靱性も非常
に良いことから、賞用されている。2. Description of the Related Art In the field of dental treatment, a part of a tooth that is missing due to a caries or the like is prosthesis. Conventionally, a gold alloy crown is capped and fixed to the remaining root of a living tooth to fix it to the tooth. However, since gold alloys are expensive in recent years, Co-Cr alloys or Ni-Cr alloys are used, and the surface color tone is approximated to the appearance of natural teeth to impart aesthetics. In order to achieve this, a method of baking oxide-based porcelain to make the surface ceramic-like has been widely put into practical use. Also, recently
Metallic titanium or titanium alloys, which are less harmful to the human body than these alloys, have been selected for their excellent corrosion resistance, strength, and toughness.
【０００３】陶歯の製造工程は、チタン製の義歯体を備
えた陶歯を例に採ると、次のようである。 （１）真空アーク溶解により溶解したチタンを、歯冠を
被帽すべき残存歯牙から印象採取して整形した歯牙外形
を備えた鋳型間隙に鋳込んで、義歯体を成型する。The manufacturing process of porcelain teeth is as follows, taking porcelain teeth having a titanium denture body as an example. (1) The denture body is molded by casting titanium melted by vacuum arc melting into a mold gap having a tooth contour shaped by taking an impression from a remaining tooth to be covered with a crown.
【０００４】（２）義歯体のチタン金属表面を、不透明
とするために、専用の陶材を塗布して薄層の焼成下地層
を形成するオペーク処理を行う。 （３）焼成下地層上に陶材スラリーを塗布して焼成し、
透明又は半透明の乳白色層とするボディー処理を行う。
次に形状を研削により修正して最終の寸法調整を行う。 （４）人の歯牙のエナメル質に近い所望の色調に色付け
るため、専用の陶材（ステイン材）を塗布して焼成する
ステイン処理を行う。 （５）ステイン処理後の表面を溶融による平滑化するた
め、焼成によるグレージング処理を行う。(2) In order to make the titanium metal surface of the denture body opaque, an opaque treatment is applied to form a thin firing base layer by applying a special porcelain. (3) The porcelain slurry is applied onto the firing base layer and fired,
The body is treated to form a transparent or translucent milky white layer.
The shape is then modified by grinding to make the final dimensional adjustment. (4) In order to tint a desired color tone close to the enamel of human teeth, a stain treatment is performed in which a dedicated porcelain (stain material) is applied and fired. (5) To smooth the surface after the stain treatment by melting, a glazing treatment by firing is performed.
【０００５】以上の４処理工程から成る焼成において
は、オペーク処理の焼成が最も高温で実施され、従来は
９５０℃程度の焼成温度を必要としていた。近年は、低
熔陶材が開発されるに至り、焼成温度も７５０〜８００
℃に下げることができている。In the firing consisting of the above-mentioned four treatment steps, the firing of the opaque treatment is carried out at the highest temperature, and conventionally a firing temperature of about 950 ° C. was required. In recent years, low-melting porcelain has been developed, and the firing temperature is 750-800.
It can be lowered to ℃.
【０００６】[0006]
【発明が解決しようとする課題】従来の各焼成工程の焼
成では、減圧可能な空気雰囲気の焼成炉を利用して、陶
材を高温焼成して、金属製の義歯体表面に焼き付けて陶
質とするが、この焼成中は、減圧状態に保持することに
より、軟化溶融する陶材中に含まれる気泡を除去して、
陶質の透明度を高め、さらに溶融脱泡後高温に保持すれ
ば陶材が垂下して陶歯外形が崩れるので、脱泡後直ちに
復圧して炉外大気中に取出し急冷する方法が採用されて
いた。In the conventional firing in each firing step, a porcelain material is fired at a high temperature by using a firing furnace in an air atmosphere capable of reducing the pressure, and is burned on the surface of a denture body made of metal. However, during this firing, by maintaining a reduced pressure, the bubbles contained in the softening and melting porcelain are removed,
If the transparency of the porcelain is increased, and if it is kept at a high temperature after melting and defoaming, the porcelain hangs down and the outer shape of the porcelain collapses. It was
【０００７】このような陶歯の焼成方法では、歯冠の金
属材料にチタン又はチタン合金を使用する場合には、低
熔陶材が一般に審美性に劣ることの他に、７５０〜８０
０℃の焼成温度でも、焼成中及び急冷中にチタン金属と
その表面の陶質との間に酸化物層が生成し、その酸化物
層において陶質が亀裂を発生し剥離するという問題があ
った。[0007] In such a method of firing a ceramic tooth, when titanium or titanium alloy is used as the metal material of the crown, the low-melting porcelain material is generally inferior in aesthetics and 750-80.
Even at a firing temperature of 0 ° C., there is a problem that an oxide layer is formed between the titanium metal and the surface ceramics during firing and quenching, and the ceramics cracks and separates in the oxide layer. It was
【０００８】また、陶歯の内側のチタン表面に焼成過程
で酸化皮膜が形成され、内側表面に酸化防止剤を塗布し
ても、酸化皮膜の生成は防止し得なかった。焼成後、わ
ずかな酸化皮膜を除去するために陶歯の内側表面を研削
すると、残存歯牙部表面と陶歯の内側表面との間のクリ
アランスが拡大されて、歯牙部に装着した陶歯が所望の
配置よりずれるために咬合を阻害するという問題も生じ
た。Further, an oxide film was formed on the titanium surface inside the porcelain tooth during the firing process, and even if an antioxidant was applied to the inside surface, the formation of the oxide film could not be prevented. After firing, grinding the inner surface of the porcelain tooth to remove a small amount of oxide film expands the clearance between the surface of the remaining tooth and the inner surface of the porcelain tooth, and the porcelain tooth attached to the tooth is desired. There was also the problem of obstructing the occlusion because it was displaced from the position of the.
【０００９】上記問題は、金属チタンあるいはチタン合
金が、高温では空気中の酸素及び窒素と化合して表面に
酸化物等を形成し易い性質から生じている。従って、焼
成中の酸化を完全に防止するには、義歯体を炉内に装入
した後、高真空に維持して加熱し、焼成後は真空中炉内
の冷却を待って取り出す他ないが、炉内の熱容量が大き
いので冷却に時間を要し、高温下での溶融陶材の垂れ下
がりは回避できない。The above problem is caused by the property that metallic titanium or titanium alloy easily combines with oxygen and nitrogen in the air at high temperature to form an oxide or the like on the surface. Therefore, in order to completely prevent oxidation during firing, there is no choice but to load the denture body into the furnace, then maintain it in a high vacuum and heat it, and after firing, wait for the furnace to cool in vacuum before taking it out. Since the heat capacity in the furnace is large, it takes time to cool the furnace, and it is inevitable that the molten porcelain hangs down at high temperatures.
【００１０】本発明は、上記問題に鑑み、陶歯の焼成過
程での酸化防止を図り、作業性にすぐれ、製造コストの
安価な陶歯の製造方法及びその製造装置を提供しようと
するものである。In view of the above problems, the present invention intends to provide a method for manufacturing a ceramic tooth and an apparatus for manufacturing the ceramic tooth, which prevents oxidation in the firing process of the ceramic tooth, is excellent in workability and is inexpensive in manufacturing cost. is there.
【００１１】[0011]
【課題を解決するための手段】本発明の陶歯の製造方法
は、易酸化性金属より成る義歯体表面に塗付された陶材
を加熱炉中で焼付ける陶歯の製造方法であって、加熱炉
内に陶材が塗布された義歯体を装入して後、炉内雰囲気
を非酸化性ガスに置換する置換工程と、当該加熱炉内の
非酸化性ガス雰囲気を減圧して、且つ加熱炉内を昇温し
て陶歯に焼成する焼成工程と、当該陶歯に非酸化性ガス
を吹き付けて、当該陶歯を急速冷却する冷却工程と、当
該義歯体が大気中で酸化しない温度に低下して後、炉内
より当該陶歯を取出す取出工程と、から成ることを特徴
とするものである。The method for producing a porcelain tooth according to the present invention is a method for producing a porcelain tooth in which a porcelain material coated on the surface of a denture body made of an easily oxidizable metal is baked in a heating furnace. After the denture body coated with porcelain is charged into the heating furnace, a replacement step of replacing the furnace atmosphere with a non-oxidizing gas, and reducing the pressure of the non-oxidizing gas atmosphere in the heating furnace, In addition, a firing process of heating the inside of the heating furnace to fire the ceramic teeth, a cooling process of blowing the non-oxidizing gas to the ceramic teeth to rapidly cool the ceramic teeth, and the denture body not being oxidized in the atmosphere. And a step of taking out the porcelain teeth from the furnace after the temperature is lowered.
【００１２】また、本発明の陶歯の製造装置は、非酸化
性ガスを導入するガス導入配管及び真空配管に接続され
た気密可能な加熱炉本体と、当該加熱炉本体内部に耐火
物の耐熱体で囲繞され且つ発熱体が配置されて成る加熱
室と、当該加熱室で加熱焼成される陶歯を保持する陶歯
保持具と、当該陶歯保持具に保持された陶歯に向けて非
酸化性ガスを噴射するガス噴射管と、から成ることを特
徴としている。この装置は、特に、当該加熱炉体の底部
には、当該加熱室に通ずる炉体開口部が設けられ、当該
陶歯保持具が昇降装置上に保持された基板上に固定され
た耐火物台から成る焼成台であって、当該焼成台が当該
炉体開口部内に装入されると共に、当該基板が当該炉体
開口部の端縁に当接して、開口部を閉止するようにした
ものが、好ましく採用される。The porcelain tooth manufacturing apparatus of the present invention comprises an airtight heating furnace main body connected to a gas introduction pipe for introducing a non-oxidizing gas and a vacuum pipe, and a heat resistant refractory material inside the heating furnace main body. A heating chamber that is surrounded by a body and in which a heating element is arranged, a ceramic tooth holder that holds the ceramic teeth that are heated and fired in the heating chamber, and a ceramic tooth that is held by the ceramic tooth holder that is not facing the ceramic teeth. And a gas injection pipe for injecting an oxidizing gas. This device is, in particular, provided at the bottom of the heating furnace body with a furnace body opening that communicates with the heating chamber, and the porcelain holder is a refractory stand fixed on a substrate held on an elevating device. A firing table comprising the firing table loaded in the furnace body opening, and the substrate coming into contact with the edge of the furnace body opening to close the opening. , Preferably adopted.
【００１３】本発明における易酸化性金属には、金属チ
タン、チタン合金、上述のＣｏ−Ｃｒ合金やＮｉ−Ｃｒ
合金、その他、高温下で容易に表面酸化層が形成される
様な金属及び合金が含まれる。The easily oxidizable metal in the present invention includes metallic titanium, titanium alloy, the above-mentioned Co-Cr alloy and Ni-Cr.
Alloys and other metals and alloys that easily form a surface oxide layer at high temperatures are included.
【００１４】[0014]
【作用】まず、製造方法の本発明につき、焼成は、４工
程から成り、第一の置換工程で、通常炉内予熱過程で、
炉内雰囲気が非酸化性ガス、例えば、不活性ガス雰囲気
に置換されるから、以後空気雰囲気に戻されるまでは、
義歯体が金属チタン又はチタン合金であっても、加熱中
に表面酸化は生じない。First, according to the present invention of the manufacturing method, the calcination comprises four steps, the first substitution step, the normal furnace preheating step,
Since the furnace atmosphere is replaced with a non-oxidizing gas, for example, an inert gas atmosphere, until it is returned to the air atmosphere thereafter,
Even if the denture body is made of titanium metal or titanium alloy, surface oxidation does not occur during heating.
【００１５】第二の焼成工程は、昇温により陶材が軟化
溶融して陶質となり、不活性ガス雰囲気を減圧するか
ら、軟化溶融の際に陶材中の気泡が減圧雰囲気に容易に
除去される。陶歯の表面層の陶質に気泡が包含されてい
ると、散乱光により濁色不透明となるが、この減圧によ
る脱泡により、冷却後の陶質の透明度が改善されて均質
となる。In the second firing step, the porcelain softens and melts into porcelain due to the temperature rise, and the inert gas atmosphere is decompressed, so that the bubbles in the porcelain are easily removed to the decompressed atmosphere during the softening and melting. To be done. When air bubbles are included in the porcelain of the surface layer of the porcelain tooth, scattered light makes the turbid color opaque, but defoaming by this reduced pressure improves the transparency of the porcelain after cooling and makes it uniform.
【００１６】第三の冷却工程は、脱泡されて均質な陶質
を有する高温の陶歯に、非酸化性ガス、例えば、不活性
ガスを吹き付けて冷却する。炉内の熱容量は大きくて
も、義歯体あるいは陶歯は形状寸法が小さく、その熱容
量も小さいから、炉内が高温にあってもガス吹き付けに
よって急速に温度が降下し、吹き付けガスが不活性ガス
等の非酸化性ガスであるから、冷却中に酸化されること
がなく、従って空気に曝露されても酸化しない温度にま
で急速に冷却される。またガス吹き付けによって、同時
に、炉内を大気圧まで復圧してもよい。第四の取出工程
は、空気中で酸化しない温度まで低下した陶歯を炉外に
取出して、放冷する。[0016] In the third cooling step, a non-oxidizing gas, for example, an inert gas is blown to cool the defrosted and hot pottery having a homogeneous pottery. Even if the heat capacity in the furnace is large, the denture or ceramic tooth is small in shape and size, and its heat capacity is also small.Therefore, even if the temperature in the furnace is high, the temperature is rapidly lowered by gas blowing, and the blowing gas is an inert gas. Since it is a non-oxidizing gas such as, it is not oxidized during cooling, and therefore is rapidly cooled to a temperature that does not oxidize when exposed to air. Further, the pressure in the furnace may be restored to the atmospheric pressure by blowing gas. In the fourth extraction step, the porcelain tooth that has been cooled to a temperature at which it does not oxidize in air is taken out of the furnace and allowed to cool.
【００１７】以上の陶歯製造方法は、上述したオペーク
処理、ボディー処理、ステイン処理及びグレージング処
理のいずれにも使用される。完成された陶歯には酸化被
膜は形成されず、また、陶質内には酸化層による剥離層
は形成されない。また、炉内の置換ガスと噴射ガスに
は、不活性ガスに代えて、窒素ガスが使用できる。この
場合、義歯体が金属チタンやチタ合金であっては、表面
に窒化物を形成するが、窒化物は緻密安定で剥離しない
ので、差し支えない。The above-mentioned method of manufacturing a ceramic tooth is used for any of the above-mentioned opaque treatment, body treatment, stain treatment and glazing treatment. No oxide film is formed on the finished porcelain tooth, and no peeling layer due to the oxide layer is formed in the porcelain. Further, as the replacement gas and the injection gas in the furnace, nitrogen gas can be used instead of the inert gas. In this case, when the denture body is made of titanium metal or titanium alloy, a nitride is formed on the surface, but since the nitride is dense and stable and does not peel off, there is no problem.
【００１８】次に、陶歯製造方法を実施するための本発
明の装置につき、加熱炉本体は気密可能で、かつ非酸化
性ガス導入管及び真空配管が接続されているから、炉内
を不活性ガス雰囲気或いは窒素ガス雰囲気とすることも
減圧することも可能である。発熱体は、通常電熱体であ
るが、加熱室内、陶歯保持具特に焼成台、陶歯保持具特
に焼成台に載置係止された陶歯を所定温度に加熱する。Next, regarding the apparatus of the present invention for carrying out the method for manufacturing a ceramic tooth, since the heating furnace main body is airtight and the non-oxidizing gas introduction pipe and the vacuum pipe are connected, the inside of the furnace is closed. An active gas atmosphere or a nitrogen gas atmosphere can be used, or the pressure can be reduced. The heating element, which is usually an electric heating element, heats the porcelain tooth holder, particularly the firing table, and the porcelain tooth held on the porcelain tooth holder, especially the firing table, to a predetermined temperature.
【００１９】ガス噴射管は、その管端開口部が陶歯保持
具に保持された陶歯に向けて設けてあるから、上記冷却
工程では、不活性ガス或いは窒素ガスを吹き付けて高温
の陶歯を急速に冷却する。当該噴射管が、開口部側に拡
管された拡管部を有し、かつ、整流板を拡管内部に装着
されているときは、不活性ガス又は窒素ガスは整流板周
縁と拡管内壁との間の間隔を流れて、噴射流が広がるの
で、陶歯保持具特に焼成台上に複数載置した陶歯を概ね
均一に冷却する。Since the tube end opening of the gas injection pipe is provided toward the porcelain tooth held by the porcelain tooth holder, in the above cooling step, inert gas or nitrogen gas is blown to the porcelain tooth at a high temperature. To cool rapidly. When the injection pipe has a pipe expanding portion expanded to the opening side and the rectifying plate is mounted inside the pipe expanding, the inert gas or the nitrogen gas is between the rectifying plate peripheral edge and the pipe expanding inner wall. Since the jet flow spreads through the space, the tooth holders, in particular, the plurality of tooth teeth placed on the firing table, are cooled substantially uniformly.
【００２０】加熱室内が高温にあっても、ガス噴射管
は、陶歯自体を空気中で酸化しない温度まで急速に冷却
するので、直ちに陶歯を炉外へ取り出すことができる。
そこで、陶歯の焼成所要時間を短縮でき、さらに炉内を
冷却することなく次の陶歯の焼成作業に移ることができ
る。Even if the temperature inside the heating chamber is high, the gas injection pipe rapidly cools the porcelain teeth to a temperature at which they do not oxidize in the air, so that the porcelain teeth can be immediately taken out of the furnace.
Therefore, the time required for firing the ceramic tooth can be shortened, and the firing operation for the next ceramic tooth can be started without cooling the inside of the furnace.
【００２１】[0021]
【実施例】本発明の実施例を、先ず、図面に基づき説明
する。図１は、本発明の陶歯焼成装置の断面図を示す
が、本装置は、竪型炉（縦型炉）であって、有底円筒状
の炉殻１０の上方は開口されて、その開口端部には炉蓋
１１が気密的に載置固定され、また底部１０１は、その
中央部に開口部１０２を有している。Embodiments of the present invention will be described first with reference to the drawings. FIG. 1 shows a cross-sectional view of a pottery firing apparatus of the present invention. This apparatus is a vertical furnace (vertical furnace), in which an upper side of a bottomed cylindrical furnace shell 10 is opened, and A furnace lid 11 is airtightly mounted and fixed on the opening end, and the bottom 101 has an opening 102 at the center thereof.
【００２２】炉殻１０の内側には、鋼板の内筒１２が固
定され、その内側には、中心方向に向けて、耐火物から
成る中空状の耐熱体２３と、その中空部壁に発熱体５
と、その内側に透明な石英管２２が配設され、石英管２
２の内側空所が加熱室２とされている。発熱体５は、本
例ではニクロム線のコイルが、当該耐熱体２３の中空部
壁に円周方向に多数設けられた縦溝の内側に垂設されて
いる。An inner cylinder 12 of a steel plate is fixed to the inside of the furnace shell 10, and a hollow heat-resistant body 23 made of a refractory material is provided inside the furnace 12 toward the center, and a heat-generating body on the wall of the hollow portion. 5
And a transparent quartz tube 22 is disposed inside the quartz tube 2
The inner space of 2 is the heating chamber 2. In the heating element 5, in this example, a coil of nichrome wire is vertically provided inside a vertical groove provided in the hollow portion wall of the heat-resistant body 23 in the circumferential direction.
【００２３】耐熱体２３の上面は、耐火ブロック２４、
２５が積載されて、発熱体５と加熱室２２の上部が覆わ
れており、耐火ブロック２４、２５には、垂直に貫通す
る小孔に、アルゴンガス噴射管４の直管部４２が、挿通
されて垂下されている。The upper surface of the heat-resistant body 23 has a refractory block 24,
25 is loaded to cover the heating element 5 and the upper part of the heating chamber 22, and the straight pipe portion 42 of the argon gas injection pipe 4 is inserted into the fireproof blocks 24 and 25 through the small holes that penetrate vertically. Have been drooped.
【００２４】炉底部については、炉殻１０の底部１０１
の開口部１０２及び石英管２２の内側に、耐火物製の焼
成台３０が装入され、焼成台３０の基板３１が、その周
縁上面が、炉殻底部１０１の開口部底面に気密的に当設
するように、昇降装置（不図示）により保持されてい
る。As for the bottom of the furnace, the bottom 101 of the furnace shell 10 is used.
A refractory baking table 30 is placed inside the opening 102 and the quartz tube 22, and the upper surface of the substrate 31 of the baking table 30 is hermetically attached to the bottom surface of the opening of the furnace shell bottom 101. It is held by a lifting device (not shown) so as to be installed.
【００２５】焼成台３０の上面には、耐熱性小棒３２が
垂設され、被焼成物たる陶歯３は、小棒３２の上端に係
止される。装入時には、図１に示すように、焼成台３０
上面は、加熱室２内の均熱域に保持されて、上記アルゴ
ンガス噴射管４の噴射口４０の直下に配置される。A heat-resistant small rod 32 is vertically provided on the upper surface of the baking table 30, and the porcelain tooth 3 as the object to be fired is locked to the upper end of the small rod 32. At the time of charging, as shown in FIG.
The upper surface is held in a soaking zone in the heating chamber 2 and is arranged immediately below the injection port 40 of the argon gas injection pipe 4.
【００２６】アルゴンガス噴射管は、図２に示すよう
に、加熱室２の天井部を成す耐火ブロック２４、２５を
貫通する石英製の直管部４２と、加熱室２内で拡大した
拡管部４１とから構成され、石英製の拡管部４１の内側
には、石英製の小円板８が拡管部内面を張渡した小径の
石英管８１により支持固定され、当該小円板８は、管軸
に共軸にかつ垂直に配置されて整流板８とされている。
これらの部材は、石英製に代えて、耐熱鋼製などとする
ことも可能であるが、炉内の急速均一加熱の点から石英
製とするのがよい。As shown in FIG. 2, the argon gas injection pipe includes a quartz straight pipe portion 42 penetrating the refractory blocks 24 and 25 forming the ceiling of the heating chamber 2 and an expanded pipe portion enlarged in the heating chamber 2. 41, and a small quartz plate 8 made of quartz is supported and fixed inside the expanded tube portion 41 made of quartz by a small-diameter quartz tube 81 stretched over the inner surface of the expanded tube portion. The current plate 8 is arranged coaxially with and perpendicular to the shaft.
These members may be made of heat-resistant steel instead of quartz, but are preferably made of quartz in view of rapid uniform heating in the furnace.
【００２７】図１において、炉蓋部１１には、アルゴン
ガス導入口４４が、アルゴンガス噴射管４の直管部４２
の管端に向けて設けられて、アルゴン配管４３に接続さ
れている。また炉蓋部１１には、加熱室２内の温度測定
用の熱電対保護管７を固定する端子７１と、ニクロム電
熱体５の導線５１の端子５２とが設けられている。In FIG. 1, an argon gas inlet 44 is provided in the furnace lid 11, and a straight pipe portion 42 of the argon gas injection pipe 4 is provided.
It is provided toward the pipe end of and is connected to the argon pipe 43. Further, the furnace lid portion 11 is provided with a terminal 71 for fixing the thermocouple protection tube 7 for measuring the temperature in the heating chamber 2 and a terminal 52 for the lead wire 51 of the nichrome electric heating element 5.
【００２８】また、同図において炉殻１０の側壁には、
真空配管６に接続された排気孔６１と、覗窓２８が設け
られている。Further, in the figure, the side wall of the furnace shell 10 is
An exhaust hole 61 connected to the vacuum pipe 6 and a viewing window 28 are provided.
【００２９】図３は、本装置の炉底部の部分断面図であ
るが、本例では、焼成台３０の基板３１が、昇降装置
（不図示）に固定された昇降台（テーブル）３３上に、
圧縮スプリング３５を介して上方に付勢可能に保持して
おり、昇降台３３を上限位置に固定したときは、圧縮ス
プリング３５の押伸弾力により、基板３１のＯリング３
１１が炉殻底部１０１の外底面に押圧されて、基板３１
と炉殻１０との間が気密状態となる。この状態で、炉内
圧が大気圧以上に高くなれば、炉内圧が基板３１を外側
へ、即ち下側へ押圧し、圧縮スプリング３５を圧縮し
て、Ｏリング３１１が底部１０１の外面より離れて、図
中矢示するようなガス流通経路を形成し、内圧を低下さ
せる。FIG. 3 is a partial cross-sectional view of the furnace bottom portion of the present apparatus. In this example, the substrate 31 of the baking table 30 is placed on an elevating table (table) 33 fixed to an elevating apparatus (not shown). ,
The O-ring 3 of the substrate 31 is held by a compression spring 35 so that it can be urged upward, and when the lift table 33 is fixed at the upper limit position, the O-ring 3 of the substrate 31 is pushed and stretched by the compression spring 35.
11 is pressed against the outer bottom surface of the furnace shell bottom portion 101, and the substrate 31
The space between the furnace and the furnace shell 10 becomes airtight. In this state, if the furnace internal pressure becomes higher than the atmospheric pressure, the furnace internal pressure presses the substrate 31 outward, that is, downward, compresses the compression spring 35, and the O-ring 311 separates from the outer surface of the bottom portion 101. , A gas flow path as shown by an arrow in the figure is formed to reduce the internal pressure.
【００３０】この圧縮スプリングによる逃し弁機構は、
減圧焼成過程から、陶歯へのアルゴン噴射に伴う復圧す
るに際して、炉殻内が大気圧以上の高圧になるのを回避
するものであるが、大気圧以上になっても、噴射管４か
らのアルゴンガスの気流が苦しく変化するのを防止する
機能を有している。The relief valve mechanism by the compression spring is
It is intended to prevent the pressure inside the furnace shell from becoming higher than atmospheric pressure when the pressure is restored from the reduced pressure firing process due to the injection of argon into the ceramic teeth. It has a function of preventing the argon gas flow from changing distressingly.
【００３１】図４は、本装置の配管系統と制御系を図示
したものである。配管系統は、アルゴンガス導入管４３
がアルゴンガスボンベ４７から流量計４６等を経由した
アルゴン開閉弁４５と接続され、アルゴンガス導入口４
４にアルゴンガスが導入される。FIG. 4 shows the piping system and control system of this apparatus. The piping system is an argon gas introduction pipe 43.
Is connected to an argon on-off valve 45 from an argon gas cylinder 47 via a flowmeter 46, and the argon gas inlet 4
Argon gas is introduced into 4.
【００３２】真空配管６は、分岐されて、一管は大気遮
蔽弁６４に、他管は真空弁６２を経て真空ポンプ６３に
接続されている。The vacuum pipe 6 is branched so that one pipe is connected to the atmosphere shielding valve 64 and the other pipe is connected to the vacuum pump 63 via the vacuum valve 62.
【００３３】制御系については、設定プログラムを記憶
実行するマイクロコンピュータを内蔵した制御部９に
は、熱電対からの導線に７２により温度信号が入力さ
れ、装作部９１から指示信号に従って、発熱体５への供
給電力と、上記アルゴン開閉弁４５、大気遮蔽弁６４及
び真空弁６２の開閉操作を行う。Regarding the control system, a temperature signal is input to the control wire 9 from the thermocouple by the conductor 72 from the thermocouple to the control part 9 having a built-in microcomputer for storing and executing the setting program. 5, and the opening / closing operation of the argon opening / closing valve 45, the atmosphere shutoff valve 64, and the vacuum valve 62 is performed.
【００３４】次に、本発明の製造方法の実施例につき、
説明する。陶歯の製造において、焼成温度が最も高いの
は、オペーク処理であるが、この場合、普通陶材を使用
した場合には最高焼成温度は約９５０℃となる。この普
通陶材と、金属性の義歯体として金属チタンとを使用し
て陶歯を焼成するプロセスを、図５のフローチャートに
より示す。Next, an embodiment of the manufacturing method of the present invention will be described.
explain. In the production of porcelain teeth, the highest firing temperature is the opaque treatment, but in this case, the maximum firing temperature is about 950 ° C. when ordinary porcelain is used. The process of firing ceramic teeth using this ordinary porcelain and titanium metal as the metallic denture body is shown by the flowchart in FIG.
【００３５】準備の段階では、炉内の発熱体５に通電し
て、焼成台３０を上昇した状態で加熱室２内の雰囲気温
度を約４５０℃に保持してのち、焼成台３０を下降さ
せ、上述のように、金属チタン製義歯体に陶材を塗布し
て乾燥させた被焼成物である陶歯一定数個を焼成台３０
上面の係止小棒３２に係止固定し、次いで焼成台３０を
上昇させて、炉内の加熱室２内に陶歯を装入して、予備
乾燥を行う。In the preparatory stage, the heating element 5 in the furnace is energized to keep the firing table 30 elevated and the ambient temperature in the heating chamber 2 maintained at about 450 ° C., and then the firing table 30 is lowered. As described above, a certain number of ceramic teeth, which are objects to be fired, which are obtained by applying porcelain to a metallic titanium denture body and drying the firing table 30
It is locked and fixed to the locking small rod 32 on the upper surface, then the firing table 30 is raised, and ceramic teeth are loaded into the heating chamber 2 in the furnace to carry out preliminary drying.
【００３６】この予備乾燥においては、焼成台３０を除
々にあるいは段階的に上昇させ、陶歯を除々に加熱昇温
させて塗布した陶材の脱水乾燥過程での亀裂・剥離を防
止する。In this preliminary drying, the firing table 30 is gradually or stepwise raised to gradually heat and raise the temperature of the porcelain to prevent cracks and peeling of the applied porcelain during the dehydration and drying process.
【００３７】焼成台３０を上限に固定して炉底部の開口
部が密閉された時点から、炉内雰囲気をアルゴンガスに
置換するが、この操作は、真空弁６２を開けて真空ポン
プ６３により排気して、炉内を１０ｍｍＨｇ以下に、特
に０．１ｍｍＨｇ以下の真空に減圧し、次いで、真空弁
を閉止して、アルゴンガス開閉弁４５を開けて、炉内に
アルゴンガス導入管４３及びアルゴンガス噴射管４を通
じてアルゴンガスを大気圧近くまで導入する。減圧−ア
ルゴン導入のこの置換操作を２回行うと、炉内雰囲気中
のアルゴン濃度は９９％以上となり、義歯体のチタンに
有害な酸素及び窒素は１％以下に希釈されている。置換
工程では炉内及び陶歯の温度は、４５０℃近傍に概ね一
定に保持予熱してある。From the time when the baking base 30 is fixed to the upper limit and the opening at the bottom of the furnace is sealed, the atmosphere in the furnace is replaced with argon gas. In this operation, the vacuum valve 62 is opened and the vacuum pump 63 evacuates. Then, the pressure in the furnace is reduced to 10 mmHg or less, particularly 0.1 mmHg or less, and then the vacuum valve is closed and the argon gas opening / closing valve 45 is opened to introduce the argon gas introducing pipe 43 and the argon gas into the furnace. Argon gas is introduced up to near atmospheric pressure through the injection pipe 4. When this substitution operation of reduced pressure-introduction of argon is performed twice, the argon concentration in the atmosphere in the furnace becomes 99% or more, and oxygen and nitrogen harmful to titanium in the dental prosthesis are diluted to 1% or less. In the replacement step, the temperature inside the furnace and the tooth are preheated while being kept substantially constant at around 450 ° C.
【００３８】次いで、真空弁６２を開けて、炉内のアル
ゴン雰囲気を減圧すると共に、発熱体への供給電力を増
加させて陶歯を焼成するが、炉内雰囲気は５０〜１００
ｍｍＨｇの圧力に保持された状態で昇温速度約６０℃／
ｍｉｎで９５０℃まで炉内を急速に加熱する。この焼成
過程で、粉末状の固着した陶材は、軟化溶融し、溶融の
際に発生する気泡は、減圧雰囲気中に逃散消泡し、冷却
後には表面及び内質とも無気泡健全で透明度の高いセラ
ミック質となる。Next, the vacuum valve 62 is opened to reduce the pressure of the argon atmosphere in the furnace and increase the electric power supplied to the heating element to fire the porcelain, but the atmosphere in the furnace is 50-100.
Temperature rising rate of about 60 ° C / mmHg
The inside of the furnace is rapidly heated to 950 ° C. in min. In this firing process, the powdered porcelain is softened and melted, and the bubbles generated at the time of melting escape into the decompressed atmosphere and disappear. It has a high ceramic quality.
【００３９】炉内温度が陶材の焼成温度９５０℃に達し
た時点で、直ちにアルゴン開閉弁を開け、アルゴンガス
噴射管４からアルゴンガスを噴射すると、当該噴射管４
の拡管部４１から、焼成台３０上の陶歯３の表面に冷え
たアルゴンガスが吹き付けられるので、高温の陶歯は高
くとも４５０℃程度まで急速に冷却される。焼成温度に
達した後もこの温度付近に長く保持すると、溶融した表
面陶材か垂下あるいは滴下して陶歯の陶質を変形してし
まうので、冷却の開始とその後の冷却は速やかに行う必
要がある。この冷却時間は本例では約２．５ｍｉｎであ
る。同時にアルゴンガスの噴射により、炉内圧は大気圧
まで上昇して復圧する。アルゴンガス導入による大気圧
以上の炉内圧に対しては、上述のような焼成台３０の基
板３１に設けた逃し弁機構が働くので、炉内が高圧にな
ることはない。また大気遮蔽弁６４を開放してもよい。When the temperature in the furnace reaches the porcelain firing temperature of 950 ° C., the argon on-off valve is immediately opened and the argon gas is injected from the argon gas injection pipe 4.
Since the cold argon gas is blown onto the surface of the porcelain tooth 3 on the firing table 30 from the expanded portion 41, the hot porcelain tooth is rapidly cooled to about 450 ° C. at the highest. If the temperature is kept around this temperature for a long time even after reaching the firing temperature, molten surface porcelain may droop or drip and deform the porcelain porcelain, so it is necessary to start cooling immediately and to cool it thereafter. There is. This cooling time is about 2.5 min in this example. At the same time, the pressure in the furnace rises to atmospheric pressure and is restored by the injection of argon gas. Since the relief valve mechanism provided on the substrate 31 of the firing table 30 as described above works against the furnace pressure higher than the atmospheric pressure due to the introduction of the argon gas, the furnace does not have a high pressure. Further, the atmosphere shutoff valve 64 may be opened.
【００４０】当該噴射管４の整流板８がないと、図２
（Ｂ）のように、直管部４２から噴出したアルゴンガス
は、その噴流が直管部４２のほぼ内径の太さのまま焼成
台３０の方向に流動するが、拡管部４１内を広がらず、
従って焼成台３０の上面の周囲全域に到達するアルゴン
ガス気流は弱い。しかし、整流板８を適当な間隙８０を
設けて取り付けてあると、同図（Ｃ）のように、整流板
８の周縁と拡管部４１内壁との間の間隙８０をアルゴン
ガスが流通して、減圧下では実線の矢示するように拡散
して焼成台３０の上面全域に噴射することができる。大
気圧に近づくにつれて、噴流は、図中破線で矢示するよ
うに焼成台３０の上面の中心部整流板８直下に迂回する
現象が認められる。整流板８を設けることにより、焼成
台３０の上面に多数の陶歯を配置でき、ほぼ同時に冷却
することができるのである。Without the straightening plate 8 of the injection pipe 4,
As in (B), the argon gas ejected from the straight pipe portion 42 flows in the direction of the firing table 30 while the jet flow is as thick as the inner diameter of the straight pipe portion 42, but does not spread in the pipe expanding portion 41. ,
Therefore, the argon gas flow that reaches the entire area around the upper surface of the baking table 30 is weak. However, when the rectifying plate 8 is attached with an appropriate gap 80, the argon gas flows through the gap 80 between the peripheral edge of the rectifying plate 8 and the inner wall of the expanded tube portion 41, as shown in FIG. Under reduced pressure, it can be diffused as shown by the solid line arrow and sprayed over the entire upper surface of the firing table 30. As the pressure approaches the atmospheric pressure, a phenomenon is observed in which the jet flow detours directly below the central straightening plate 8 on the upper surface of the firing table 30 as indicated by the dashed line in the figure. By providing the baffle plate 8, a large number of porcelain teeth can be arranged on the upper surface of the firing table 30, and cooling can be performed almost simultaneously.
【００４１】陶歯３の温度が４５０℃以下に低下した時
点で、焼成台３０を下降させて、空気中で陶歯を１００
℃以下に放冷してのち、陶歯を焼成台３０より取外す。
この段階で、炉内雰囲気温度は約４５０℃に保持されて
いる。When the temperature of the ceramic tooth 3 drops to 450 ° C. or lower, the firing table 30 is lowered to move the ceramic tooth 100 to 100 in the air.
After allowing to cool to below ℃, the ceramic tooth is removed from the firing table 30.
At this stage, the ambient temperature in the furnace is maintained at about 450 ° C.
【００４２】以上の焼成方法において、陶歯の焼成工程
及びアルゴンガス冷却工程は、真空雰囲気又はアルゴン
置換雰囲気であるから、義歯体のチタンは、９５０℃も
の高温にあっても表面が酸化されることはない。また、
アルゴンガス噴射中の冷却過程も、焼成台降下後の放冷
過程では４５０℃以下の低温であるから、空気中放冷に
あっても、表面が酸化されることはない。以上の製造方
法は、陶歯のオペーク処理について述べたが、順次、ボ
ディー処理、ステイン処理及びグレージング処理にも、
同様に実施される。これらの場合に陶材の材質が変ら
れ、その材質により定まった焼成温度で減圧焼成がされ
る。In the above firing method, since the firing step and the argon gas cooling step of the ceramic tooth are a vacuum atmosphere or an argon substitution atmosphere, the surface of titanium of the denture is oxidized even at a high temperature of 950 ° C. There is no such thing. Also,
Also in the cooling process during the injection of argon gas, the temperature is 450 ° C. or lower in the cooling process after the firing table is lowered, so that the surface is not oxidized even in the cooling process in the air. The above manufacturing method has been described with respect to the opaque treatment of the ceramic tooth, but in the body treatment, the stain treatment and the glazing treatment,
The same is done. In these cases, the material of the porcelain is changed, and the reduced pressure firing is performed at the firing temperature determined by the material.
【００４３】以上の実施例は、竪型炉の例であるが、横
型炉であってもよい。この場合は、加熱室を中心軸を水
平と成すような中空状とすれば、陶歯保持具は、例え
ば、当該加熱室に連通する炉殻側壁開口部に備えた開閉
自在の扉の耐火性内面が利用される。義歯体或いは陶歯
は、その耐火性内面に突起した耐火性小棒に係止され、
不活性ガス噴射管は、この耐火性内面に管端開口部の噴
射口が向けられて配置固定されるのである。その他，本
発明の範囲を逸脱しない限り、炉型式、陶歯保持具の構
造、不活性ガス噴射管の構造配置などは適宜変更利用す
ることが可能である。Although the above embodiment is an example of the vertical furnace, it may be a horizontal furnace. In this case, if the heating chamber is made hollow so that the central axis is horizontal, the porcelain tooth holder may have, for example, a fire resistance of an openable / closable door provided in a furnace shell side wall opening communicating with the heating chamber. The inside is used. The denture or ceramic tooth is locked to the fire-resistant small rod protruding on the fire-resistant inner surface,
The inert gas injection pipe is arranged and fixed so that the injection port of the pipe end opening is directed to the refractory inner surface. In addition, the furnace type, the structure of the tooth holder, the structural arrangement of the inert gas injection pipe, and the like can be appropriately changed and used without departing from the scope of the present invention.
【００４４】[0044]
【発明の効果】本発明の陶歯製造方法及び装置は、陶歯
の予熱、焼成及び冷却の工程において、いずれも不活性
ガス雰囲気中又は不活性ガス雰囲気を減圧した減圧雰囲
気中で処理実施されるから、陶歯を構成する義歯体が酸
化性金属であっても、裏面に酸化被膜が形成されること
がなく、また陶質部との境界に酸化層が形成されないの
で、陶歯の陶質部が亀裂を生じ破損することがなく、ま
た陶歯内側の裏面を歯牙部に装着するに際しても、極め
て精度よく装着することができる。INDUSTRIAL APPLICABILITY The method and apparatus for producing porcelain teeth according to the present invention are carried out in an inert gas atmosphere or a reduced pressure atmosphere in which the inert gas atmosphere is depressurized in the steps of preheating, firing and cooling the porcelain teeth. Therefore, even if the dental prosthesis that constitutes the ceramic tooth is an oxidizing metal, no oxide film is formed on the back surface and no oxide layer is formed at the boundary with the ceramic portion. The textured portion is not cracked and damaged, and the back surface of the inner side of the porcelain tooth can be attached to the tooth portion with extremely high accuracy.
【００４５】特に、焼成工程後の冷却過程では、表面が
高温溶融状態にある陶歯に不活性ガス又は窒素ガスを吹
き付けて冷却するので、炉内雰囲気が高温であっても、
熱容量の小さい陶歯は急速に温度を低下させて、炉外に
非酸化状態で速やかに取り出すことができ、従って、陶
歯の表面陶質の溶融垂下による陶歯変形を防止して、且
つ、従来の大気中の放冷による陶歯義歯体の酸化を完全
防止することができる。また、炉内は常時予熱温度に保
持できるから、炉内を冷却することなく、順次陶歯の焼
成が可能であって、陶歯の生産性に優れている。In particular, in the cooling process after the firing process, since the inert gas or nitrogen gas is blown onto the porcelain tooth whose surface is in a high temperature molten state to cool it, even if the atmosphere in the furnace is high,
Porcelain teeth with a small heat capacity can be quickly taken out of the furnace in a non-oxidized state by rapidly lowering the temperature, thus preventing the deformation of the porcelain teeth due to the drooling of the surface porcelain, and, It is possible to completely prevent the oxidation of the ceramic denture body due to the conventional cooling in the atmosphere. Further, since the inside of the furnace can be maintained at the preheating temperature at all times, the porcelain teeth can be sequentially fired without cooling the inside of the furnace, and the productivity of the porcelain teeth is excellent.
【００４６】ガス噴射管は、噴射口に向けて拡管され、
その拡管内に円板状の熱流板を備えたものであるとき
は、噴射された不活性ガス又は窒素ガスが放射状に拡が
り、焼成台上の複数もしくは多数の陶歯を同時に冷却す
ることができるので、本装置は、多数の陶歯を容易に焼
成することが可能となり、量産性にすぐれている。The gas injection pipe is expanded toward the injection port,
When the expanded tube is equipped with a disk-shaped heat flow plate, the injected inert gas or nitrogen gas spreads radially, and a plurality of or a large number of porcelain teeth on the firing table can be cooled at the same time. Therefore, this device can easily burn a large number of porcelain teeth and is excellent in mass productivity.
【図１】陶歯焼成装置の断面図。FIG. 1 is a sectional view of a pottery firing device.
【図２】陶歯焼成装置の加熱室内の部分斜視図（Ａ）と
不活性ガス噴射管からの噴流示す概念図（Ｂ，Ｃ）。FIG. 2 is a partial perspective view (A) of a heating chamber of a pottery firing device and conceptual views (B, C) showing a jet flow from an inert gas injection pipe.
【図３】陶歯焼成装置の底部の断面図。FIG. 3 is a sectional view of the bottom of the pottery firing device.
【図４】陶歯焼成装置の制御系統図。FIG. 4 is a control system diagram of a pottery firing device.
【図５】本発明の陶歯製造工程のフローチャート。FIG. 5 is a flow chart of a ceramic tooth manufacturing process of the present invention.
１ 焼成炉本体 ２ 加熱室 ２２ 石英管 ２３ 耐熱体 ３ 陶歯 ３０ 焼成台 ３１ 焼成台基板 ４ アルゴンガス噴射管 ４１ 拡管部 ４２ 直管部 ４３ アルゴンガス導入管 ５ ニクロム発熱体 ６ 排気管 ８ 熱流板 ９ 制御部 DESCRIPTION OF SYMBOLS 1 Firing furnace main body 2 Heating chamber 22 Quartz tube 23 Heat-resistant body 3 Porcelain tooth 30 Firing table 31 Firing table substrate 4 Argon gas injection tube 41 Expanding section 42 Straight tube section 43 Argon gas introducing tube 5 Nichrome heating element 6 Exhaust tube 8 Heat flow plate 9 control unit
Claims (4)
された陶材を加熱炉中で焼付ける陶歯の製造方法におい
て、 加熱炉内に陶歯若しくは陶材が塗布された義歯体を装入
して後、炉内雰囲気を非酸化性ガスに置換する置換工程
と、 当該加熱炉内の非酸化性ガス雰囲気を減圧して、且つ加
熱炉内を昇温して陶歯に焼成する焼成工程と、 当該陶歯に非酸化性ガスを吹き付けて、当該陶歯を急速
冷却する冷却工程と、 当該義歯体が大気中で酸化しない温度に低下して後、炉
内より当該陶歯を取出す取出工程と、から成ることを特
徴とする陶歯の製造方法。1. A method for producing a porcelain tooth in which a porcelain material coated on the surface of a denture body made of an easily oxidizable metal is baked in a heating furnace, wherein the denture body or the denture body coated with the porcelain material is inside the heating furnace. After the charging, the substitution step of substituting the atmosphere in the furnace with a non-oxidizing gas, the pressure in the non-oxidizing gas atmosphere in the heating furnace is reduced, and the temperature in the heating furnace is raised to burn the ceramics. Firing step, and a cooling step of spraying a non-oxidizing gas to the porcelain tooth to rapidly cool the porcelain tooth, and the denture body being cooled to a temperature at which it does not oxidize in the atmosphere, A method of manufacturing a ceramic tooth, which comprises a take-out step of taking out.
び真空配管に接続された気密可能な加熱炉本体と、当該
加熱炉本体内部に耐火物の耐熱体で囲繞され且つ発熱体
が配置されて成る加熱室と、当該加熱室で加熱焼成され
る陶歯を保持する陶歯保持具と、当該陶歯保持具に保持
された陶歯に向けて非酸化性ガスを噴射するガス噴射管
と、から成る陶歯焼成装置。2. An airtight heating furnace body connected to a gas introducing pipe for introducing a non-oxidizing gas and a vacuum pipe, and a heating element surrounded by a refractory material of a refractory material inside the heating furnace body. A heating chamber, a ceramic tooth holder that holds the ceramic tooth heated and fired in the heating chamber, and a gas injection pipe that injects a non-oxidizing gas toward the ceramic tooth held by the ceramic tooth holder. Porcelain firing device consisting of.
通ずる炉体開口部が設けられ、当該陶歯保持具が昇降装
置上に保持された基板上に固定された耐火物台から成る
焼成台であって、当該焼成台が当該炉体開口部内に装入
されると共に、当該基板が当該炉体開口部の端縁に当接
して、開口部を閉止するようにした請求項２記載の装
置。3. A furnace body opening which communicates with the heating chamber is provided at the bottom of the heating furnace body, and the porcelain holder is fixed from a refractory stand fixed on a substrate held on an elevating device. A firing table comprising: the firing table, the firing table being loaded into the furnace body opening, and the substrate being in contact with an edge of the furnace body opening to close the opening. The described device.
けて漸拡された拡管部を有し、当該拡管部の内側には、
当該拡管部の中心軸と垂直な面を有する整流板が、当該
拡管部内壁との間に所望のガス流通間隔を設けて配置さ
れている請求項２又は３記載の装置。4. The gas injection pipe has a pipe expanding portion gradually expanded toward the pipe end opening, and inside the pipe expanding portion,
The apparatus according to claim 2 or 3, wherein the flow straightening plate having a surface perpendicular to the central axis of the pipe expanding portion is arranged with a desired gas flow gap between the inner wall of the pipe expanding portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682192A JP3291014B2 (en) | 1992-02-07 | 1992-02-07 | Method and apparatus for producing ceramic teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5682192A JP3291014B2 (en) | 1992-02-07 | 1992-02-07 | Method and apparatus for producing ceramic teeth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05212062A true JPH05212062A (en) | 1993-08-24 |
| JP3291014B2 JP3291014B2 (en) | 2002-06-10 |
Family
ID=13038041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5682192A Expired - Lifetime JP3291014B2 (en) | 1992-02-07 | 1992-02-07 | Method and apparatus for producing ceramic teeth |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3291014B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008541890A (en) * | 2005-06-03 | 2008-11-27 | ヴォルツ シュテファン | Method for producing a prosthesis from dental metal powder |
| KR100920093B1 (en) * | 2007-09-28 | 2009-10-01 | 김병관 | Method for sintering artificial tooth |
| JP2018023791A (en) * | 2012-07-27 | 2018-02-15 | シロナ・デンタル・システムズ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Sintering furnace for component made of sintered material, in particular for dental component, and method for sintering such component |
| CN112595114A (en) * | 2020-11-25 | 2021-04-02 | 钱江涛 | Porcelain stove is used in artificial tooth production |
| CN114353525A (en) * | 2021-12-22 | 2022-04-15 | 江苏上和口腔医疗科技有限公司 | Porcelain powder porcelain oven convenient to take out |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10227566B4 (en) * | 2002-06-20 | 2007-09-27 | Dentsply Detrey Gmbh | Heating muffle for a kiln for producing a titanium-containing dental ceramic product, process for its production and use, and kiln containing the heating muffle |
-
1992
- 1992-02-07 JP JP5682192A patent/JP3291014B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008541890A (en) * | 2005-06-03 | 2008-11-27 | ヴォルツ シュテファン | Method for producing a prosthesis from dental metal powder |
| KR100920093B1 (en) * | 2007-09-28 | 2009-10-01 | 김병관 | Method for sintering artificial tooth |
| JP2018023791A (en) * | 2012-07-27 | 2018-02-15 | シロナ・デンタル・システムズ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Sintering furnace for component made of sintered material, in particular for dental component, and method for sintering such component |
| CN112595114A (en) * | 2020-11-25 | 2021-04-02 | 钱江涛 | Porcelain stove is used in artificial tooth production |
| CN114353525A (en) * | 2021-12-22 | 2022-04-15 | 江苏上和口腔医疗科技有限公司 | Porcelain powder porcelain oven convenient to take out |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3291014B2 (en) | 2002-06-10 |
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